Milking machine



Aug. 16, 1932. F. HENRARD MILKING MACHINE Filed oct. 4. 1929 PatentedY Aug. 16, 1932 c, ERNAND HENRARn or BRUSSELS, BELGIUM, AssIGNoR To EcREMEUsEs MELOTTE =socI`ETE ANONYME., or REMICOURT, BELGIUM Y yMILKING ivraoiarnnY application med' ceto-ber 4, 192e.V 'serialiY Nq. 397,282'.

Y In milling machines employed up tothe present time -themilking operation Vhas been effected by a suction transmitted totheteat, this suction being either of varying intensity or permanent and combined with a varying` pressure appliedrto the body-'of theteat fby means of pulsating members. `The arra'ngef ment of the teat in a rubber sleeve has perv mitted the milking r'operation to be assisted and the congestion of the teats produced by the suction to be partly overcome but the compression produced by the sleeve has had the e'ect of driving a part of the milk contained in the teat back into the udder and thusreducing the useful action ofv the apparatus.

Moreover the alternate and successive tensions acting upon the sleeve weakened it and rapidly causedV it to become useless.

The present invention removes these disad- `V vantages by means of a simpliiied arrange ment of the apparatus and by dispensing with 4 the complicated pulsating members.

According to the invention the vacuum effect is secured in a 25V permanent manner at the `end of the teats while their body is removed from the action of atmospheric pressure, thus preventing them from being flattenedV and from the action of the vacuum, thus preventing the congestion of the teats.

' This protection against iiattening is se;

cured by arranging the teat in a member adapted to exert a radial effort outwards in such a Way as-.to counter-balance the action of the atmospheric'pressure.` Y

According to one construction of the invention, the body of the teat which carries the said member by means `o an elastic element, can be removed from the action of atmospheric pressure by forming a chamber which is Huid tight, the atmospheric pressurebe-V `tween this elastic element and the indeformable Vmember or casing enveloping the elastic elementand the tea-t. y K

The accompanying drawing illustrates yone embodiment of the invention by way of example and in a non-limiting manner.

The single figure is a half-section in permi'lking cup according the teat to be congested.

which is located `in 3a The milking cup 2 comprises ametalcasing t NITED. PATENT *OFFICE il g 2a renclosing an elastic element such as the. j

rubber sleeve or tube 2b in which thefteat not shownin the drawing, engages, andfcom, municates with the yvacuum 'ductBa Y Inthis milkingA cup any communication y withv the atmospheric pressure'l is prevented'- when theicup is inf-its normalposition ofsoperation. Atthis moment the teatis engagedV in the VsleeveQ of: the said cup; and its end only is subjectedl to the permanent action'of the vacuum. But Vif certain-precautions were i not taken, the vacuum existing in the interior ofthe tube would flatten the latter under the action of the atmospheric pressure.` *In order toV avoid this .flattening eifect, the body yof the teat,` Whichis surrounded by the elastic ele#k ment 2b, is removed from' the action of at?" mosphericpressure by `forl'ning a luidltight chamber 2k between said: element and ithe casing 2m Y v y Another disadvantage of the milking cups at present employed resides in thev factf that as a result-"of a free the flexible tube orelement 2b and the teat when the apparatus is at rest,4 the teatis subjected to the action of the ,vacuumv whenv tle apparatus communicate'swith the-source O. around the teat hinders'milking by causing In the :milking cup according to 'the inven-Y t1on,the teat is protected fromthe Vaction of the vacuum bythe fact that the teatI is lodged in the elastic elementQ which. in

the position of rest, adheres perfectly to lthe 54 said teat.` The element 2b, which has adi-f ameterless than thatoffthe teat,'=serves atthe same time'for suspending Vthe milking cup. The `diameter of` thiselement 265 is chosen in such `a way that` even rby .undergoing va ra dialV tensionproducecl by the' vacuum existing "in the chamber 2k, i from' theteat and'thusprevents the vacuum from acting on the'body of the lteat. Y

f TheV {luid-tight' condition of this chamber 274 is secured by means of pacling's5'one formed'V by the' ring 2m around: which is wound 'a' partv of 'the elastic `sleeve Maand` `corresponding Acavity space existing between Y it doesnot separate? vacuum. @This vacuum which exists y :sov

V39-J ting the chamber 21o into communication withV thevacuum' ductBc by means of an orifice.

such afs 3p provided fin the connectingvele-v formed inthe inner wall `of thegcasing 2a,

' and another formed by a projection 3a capable of bearing upon the inclined surface 2p of the sleeve 2a, this projection forming part of a connecting member 3 acting between thecasing Qa and the duct 81s connect- `ed to the collecting.; receptacle andV toithe vacuum apparatus, not shown in the ,drawing.

made of rubber or similarmaterial and of suitable shape upon the end 2t of the casing which is provided with a rim,` 5 llghe atrnos-Y pheric pressure is prevented from entering between the-contactingparts ofthe body of the A'teat and'of the elasticelementl 2b by the fact ithat the rim ofa' central orice in the;

' cap 2s;` whichorifice-is of' corresponding dibe understood thatthe communicationxbe-l ameterrtof that of the teat, :pressesv against the.;lat'ter towards the-end adjacentcto the udder..-

The' packingv whichrprevents the access ofy atmospheric pressure i alongithe Tout-er wall of j thet-eat may Aalso'comprisea ring made of"l so-called spongyvr rubber situa'tedjnear the end 2t ofthe casing 2a.` A Y' y, vThe flattening ofthe tea-t of the sleeve or tube Qispreventedby putment 3.V

F element@ thisoriicep may also be formed at the lower end of the casing 2a. It will rearing 2m is hde againaihwaii di @ha corresponding cavity'by 'arranging a cap 2s and consequentlyu Instead of beingbored in the connecting` be obtained by making said sleeve rigidwith van undeformable sleeve such as the kcasing 2a by means, of springs exerting a peripheral pull away from the axisof the sleeve 2b. ".What I claim is: f

'A `milking cup7 comprisingy arigid casing connected at its lowerv end with a conduit `leadingto a continuous vacuum7 a cylindrical elasticnipple joined at one of its ends to the upperV portion ofthe ysaid casingand joined at its other end tothe said conduit, 'the nipplehaving a thin wall and a diameter suiiiciently small to envelop a teat of small dimension and adapted on account of its thin walland' its elasticity-to permit the introduction of large teats, andan annular airtight pocket between the casing `and thef nipple, vthe conduit being .provided l with anopening jleading to the' air-tight pockettto; v

permit the same vacuumto act on the pocket and onthe nipple.- -1 -Y I n testimony whereof Ahave 'affixed' my c, IFniumin -HENRARD signature.

soi'

c tweenthe chamber 27e and the duct- 37g: may f some being bored in be obtained by means of two or more orifices,

others .being provided casing 2a;

The equilibrium'betweenthe forces acting upon the` teat having been obtained,Y the suceA ."tion will be produced only at Athe end of the teat on which the suction acts.

The invention also provides for .the

ofthetest topbe removed from the action of atmosphericA pressure by employing simply one sheath, such as the lieXible element 2b,Y formed vin such amanner as to perform at. the Y same time' the `two following functions Y:-

the element 3, and the f at the lower end of they firstly, to adhere sufficiently to Ythe teatto.

secure the lsuspension 'of the apparatus (as c is done by the element 2b shown inthe drawing) and secondly,i to oppose externally.V a

' liao l sufficient resistance to counter balance the tothe sleeveQb by providingit with'a'- suitable framework. VThis resistancef-may also 

